The North Face Summit Casaval Hoodie impresses us on our high-output activities in the mountains. The light and stretchy face fabric and synthetic Ventrix insulation keep us warm in chilly conditions yet breathe when we're in blast furnace mode, charging up the skin track, post-holing our way through a snowy trail, or scaling icy waterfalls. The zonal insulation targets our core with extra warmth while dialing down insulation in the arms and hood to dump excess heat and support a full range of motion. Part of The North Face Summit Series, this is a high-performance mid-layer that helps us go hard without getting too cold--or too hot--on our ice climbs, winter hikes, ski tours, and mountaineering missions.